12 41 020 Removing and installing/replacing starter (N54, N54T, N55)
WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
Aluminium-magnesium materials.
No steel screws/bolts may be used due to the threat of electrochemical corrosion.
A magnesium crankcase requires aluminum screws/bolts exclusively.
Aluminum screws/bolts must be replaced each time they are released.
Aluminum screws/bolts are permitted with and without color coding (blue).
For reliable identification:
Aluminum screws/bolts are not magnetic.
Jointing torque and angle of rotation must be observed without fail (risk of damage).
No steel screws/bolts may be used due to the threat of electrochemical corrosion.
A magnesium crankcase requires aluminum screws/bolts exclusively.
Aluminum screws/bolts must be replaced each time they are released.
Aluminum screws/bolts are permitted with and without color coding (blue).
For reliable identification:
Aluminum screws/bolts are not magnetic.
Jointing torque and angle of rotation must be observed without fail (risk of damage).
Necessary preliminary tasks:
- Switch off ignition
- Clamp off battery negative lead . See 61 20 900 DISCONNECTING AND CONNECTING BATTERY NEGATIVE LEAD .
- Remove intake air manifold . See 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (N54, N54T) .
Unlock connector (1) and remove.
Release nut (2) and remove the positive battery cable.
Tightening torque 12 41 3AZ, see 12 41 STARTER MOTOR WITH MOUNTING .
Release screws (3) and remove starter motor.
Tightening torque 12 41 1AZ, see 12 41 STARTER MOTOR WITH MOUNTING .
Tightening torque 12 41 2AZ, see 12 41 STARTER MOTOR WITH MOUNTING .
Installation:
Check starter pinion and ring gear for damage. Replace starter if necessary.